Aircraft



FIG. 1 is a left side, elevational view of the aircraft, showing my new design, with the right side constituting a mirror-image of the left side;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an aircraft, as shown and described. 